HSC Science कक्षा १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Chemistry

The fraction of total volume occupied by the atoms in a simple cubic is

If ‘a’ stands for the edge length of the cubic system; sc, bcc, and fcc. Then the ratio of radii of spheres in these systems will be respectively.

If ‘a’ is the length of the side of the cube, the distance between the body-centered atom and one corner atom in the cube will be ______.

Potassium has a bcc structure with nearest neighbor distance 4.52 A⁰. its atomic weight is 39. its density will be

Explain briefly seven types of unit cells.

Calculate the number of atoms in a fcc unit cell.

What is meant by the term “coordination number”?

What is the coordination number of atoms in a bcc structure?

An element has bcc structure with a cell edge of 288 pm. The density of the element is 7.2 g cm⁻³. How many atoms are present in 208 g of the element?

Aluminium crystallizes in a cubic close packed structure. Its metallic radius is 125 pm. calculate the edge length of the unit cell.

KF crystallizes in fcc structure like sodium chloride. calculate the distance between K⁺ and F⁻ in KF.
(Given: density of KF is 2.48 g cm⁻³)

An atom crystallizes in fcc crystal lattice and has a density of 10 g cm⁻³ with unit cell edge length of 100 pm. calculate the number of atoms present in 1 g of crystal.

Atoms X and Y form bcc crystalline structure. Atom X is present at the corners of the cube and Y is at the centre of the cube. What is the formula of the compound?

Sodium metal crystallizes in bcc structure with the edge length of the unit cell 4.3 × 10⁻⁸ cm. calculate the radius of a sodium atom.

Explain pseudo-first-order reaction with an example.

Derive an expression for Ostwald’s dilution law.

Fog is colloidal solution of ____________.

Assertion: Coagulation power of Al³⁺ is more than Na⁺.

Reason: greater the valency of the flocculating ion added, greater is its power to cause precipitation.

Statement: To stop bleeding from an injury, ferric chloride can be applied. Which comment about the statement is justified?

Hair cream is ____________.